I'm having some problem with the following error message when executing the Exchange Server 2010 SP3 installation on my Schema Master domain controller under my admin account:
Organization Preparation FAILED The following error was generated when "$error.Clear();
initialize-ExchangeUniversalGroups -DomainController $RoleDomainController -ActiveDirectorySplitPermissions $RoleActiveDirectorySplitPermissions" was run: "Active Directory operation failed on PRODDC01.MyDomain.com. The object 'OU=Microsoft Exchange Security Groups,DC=MyDomain,DC=com' already exists.".
I'm trying to delete the "Microsoft Exchange Security Groups" in AD Users & Computers console with advanced view, but somehow the search returns no result ?
Any help and suggestion would be appreciated muchly.